Any one have 3 kids under 3? I need advice!

So I currently have 2 babies, 21 months and 7 months. They are 14 months apart and aside from the initial adjustment period, I absolutely love their age gap. We are letting nature take its course and not doing anything to prevent another pregnancy. We want 4 kids in total and want them to all be fairly close in age. Plus when we are finished, I want to be a surrogate so I don't want to be too old. If I am pregnant now (too early to test) babies #2 and #3 Will be 15 months apart. This is something that we want. We have all of the means to care for our children plus more children. My mom watches my kids so when I new baby gets here, my oldest will go to day care part time. I am terrified though that everyone will be really negative about it and not happy for us. Any advice from those thay have gone through something similar?